Blind-fastener.



No. 684,497. Patented Oct. [5, I90I.

J. DAVIES.

BLIND FASTENER.

(Application filed Dec. 3, 1900.)

(No Model.)

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UNITED STATES PATENT ()FFICE.

JOHN DAVIES, OF ST. LOUIS, MISSOURI.

BLlND-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 684,497, dated October 15, 19 01.

Application filed December 3,1900. Serial No. 38,423. (No model.)

To all whom it may concern.-

Beit known that 1, JOHN DAvlEs, of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Blind-Fasteners, of which the following is a f n11, clear,and exact description, reference being had to the accompanyingdrawings, forming a part hereof.

This invention relates to blind-fasteners; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed.

'lheobject of this invention is to provide an improved fastener for blinds which is so constructed that it can only be detached from the inside whenever it is desired to open the blinds and is provided with a locking-wedge adapted to be held 'in place by the windowsas Figure 1 is a perspective view showing my improved blind-fastener in position for use. Fig. 2 is a sectional view of a socket constituting a part of my invention. Fig. 3 is a side elevation showing that portion of the fastener which is carried by the blind. Fig. 4 is a horizontal sectional view of a socket which is carried by the window-casing. Fig. 5 is a top View, with parts shown in section, of that part of the fastener which is carried by the blind. Fig. 6 is a view showing the fastener in actual use.

In the construction of my improved blindfastener I provide a socket 1, adapted to be secured to the blind and to project at a right angle therefrom. The outer ends of the fasteners 2 are located within the socket 1 and are retained therein by means of the pin 3. The arrangement of the socket 1 and the fasteners 2 is such that the fasteners may have a certain lateral movement, but are prevented from vertical movement on account of their edges being close against the interior of the socket 1. This allows for the operation of the fasteners in order to engage them with the other member, which is carried by the window-casing, and also prevents their forward ends from moving to a position out of alinement with the said member.

Intermediate of the ends of the fasteners 2 is a pin 4, one end of which is located within an opening in one of the members 2, wherein it is retained by means of a pin 5. The opposite end of the pin 1 projects through an opening in the other member 2 and carries on its outer extremity a pin 6, adapted to contact with the member 2 to prevent the said pin 4 from being moved out of the opening in which it is located. A spring 7 encircles that portion of the pin 4 between the members 2 and serves to press apart the said members 2 in order to cause them to better engage with that member of the latch which is carried by the window-casing.

8 indicates suitable push-knobs carried by the fasteners 2, whereby they may be easily pressed together in opposition to the spring 7 in order to free them from engagement with the second member of the fastener whenever it is desired to open the blinds.

Rigid with the projecting ends of the members 2 are shoulders 9, the outer sides of which are beveled, as shown in Fig. 5. The func tion of the shoulders 9 is to engage with the member of the fastener which is carried by the window-casing.

10 denotes a socket adapted to be secured to the window-casing in alinement with the fasteners 2, and the outer end of said socket 10 is provided with the internal flanges 11, one on each side of the said socket. A suitable connection 12 has one end secured to the socket 10 and carries on its opposite end a wedge or otherseparating device 13, the function of which is to engage between the inner ends of the fasteners 2 when they are within the socket 10 and to press them apart, as shown in Fig. 6, to cause the shoulders 9 to engage against the flanges 11.

In operation the socket 1 is secured to the blind, as stated, and the socket 10 is secured to the window-casing in alinement with the said socket 1 and the fasteners 2,. carried thereby. 'The spring 7 normally holds the fasteners 2 separated from each other, as shown in Fig. 5,but their ends, being beveled, will pass within the socket 10 whenever the blind is closed. \Vhen the blind is entirely closed, the shoulders 9 are entirely within the socket 10, and the said shoulders engage directly against the flanges 11 in the manner shown in Fig. 6. The wedge or separator 13 is then passed between the ends of the fasteners 2 to prevent the said fasteners from being pressed together to release them from their engagement in order to open the blind. The device 13 is preferably of such length that when the Window is lowered its rear end is in contact With the window-sash, thereby absolutely prohibiting its removal except by raising the window, and since Windows are usually provided with fasteners to hold them in position it follows that the blind-fastener cannot possibly be released except from the inside.

I claim-- 1. A blindfastener,consisting of mating spring-actuated hooks or catches carried by the blind, a socket carried by the Windowcasing adapted to receive the said hooks or catches and having internal projections for engaging the hooks, and means for holding the hooks-in engagement with said socket, substantially as specified.

2. A blind-fastener, consisting of corresponding spring-actuated hooks or catches adapted to be carried by the blind, in combination with a socket secured to the'windowcasing for receiving the said hooks or catches and having projections for engaging said hooks, and means for preventing their removal Without moving the Window.

A blind-fastener, consisting of a socket to be carried by the blind, two hooks carried by said socket, and a second socket to be secured to the window-casing and having internal projections for engaging said hooks, in combination with a movable Wedge to be inserted between the ends of the hooks to hold them in engagement with said projections, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

JOIIN DAVIES. Witnesses:

ALFRED A. EIcKs, JOHN D. RIPPEY. 

